Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            559       485       22.720613  23.143387  22.993697  0.096042   22.995678 
2008            559       485       19.079033  19.599226  19.337342  0.121891   19.306807 
2009            559       485       19.732775  20.650484  20.134018  0.251593   20.096096 
2010            559       485       19.495483  20.025614  19.678095  0.136843   19.639904 
2011            559       485       19.552065  20.038355  19.82332   0.134484   19.820032 
2012            559       485       19.946064  20.606194  20.319071  0.177823   20.339968 
2013            559       485       19.989677  20.600033  20.298142  0.150476   20.296904 
2014            559       485       20.459709  21.001387  20.702723  0.145609   20.713581 
2015            559       485       19.541388  20.085581  19.831758  0.153418   19.852259 
2016            559       485       20.665936  21.165968  20.895413  0.148209   20.890678 
2017            559       485       21.598064  21.876904  21.749792  0.070473   21.730904 
2018            559       485       22.421129  22.798935  22.651021  0.079419   22.65258  
2019            559       485       21.065096  21.63942   21.347455  0.15912    21.349194 
2020            559       485       20.296322  20.852354  20.612011  0.150776   20.594774 
2021            559       485       21.490162  21.745001  21.601832  0.067072   21.585032 
2022            559       485       18.366323  19.117935  18.71421   0.196475   18.69787  
2023            559       485       19.976227  20.483582  20.299356  0.121513   20.334129